// license:BSD-3-Clause // copyright-holders:Curt Coder /* ABC SIO PCB Layout ---------- |-------------------------------------------| |-| | |-| | |-| Z80SIO CN2 | |-| | |-| 4.9152MHz | |-| | |-| ROM0 Z80CTC | |-| CN1 | |-| ROM1 | |-------------------------------------------| Notes: Relevant IC's shown. ROM0 - Hitachi HN462716 2Kx8 EPROM "SYN 1.6" ROM1 - Mitsubishi MB8516 2Kx8 EPROM "T80 1.3" Z80SIO - Zilog Z-80A SIO/0 Z80CTC - Zilog Z-80A CTC CN1 - DB9 serial connector CN2 - DB25 serial connector */ #include "sio.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define Z80CTC_TAG "z80ctc" #define Z80SIO_TAG "z80sio" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type ABC_SIO = &device_creator; //------------------------------------------------- // ROM( abc_sio ) //------------------------------------------------- ROM_START( abc_sio ) ROM_REGION( 0x1000, "abc80", 0 ) ROM_LOAD( "t80 1.3", 0x000, 0x800, CRC(f20ff827) SHA1(a1c4af1c374184a14872d7253d6f9e470603117f) ) ROM_LOAD( "syn 1.6", 0x800, 0x800, CRC(7bd96b75) SHA1(d1f9b16530be28b03eeddb3f6ee4fa9e1cc9458e) ) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *abc_sio_device::device_rom_region() const { return ROM_NAME( abc_sio ); } //------------------------------------------------- // Z80CTC_INTERFACE( ctc_intf ) //------------------------------------------------- static Z80CTC_INTERFACE( ctc_intf ) { DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL }; //------------------------------------------------- // Z80DART_INTERFACE( sio_intf ) //------------------------------------------------- static Z80DART_INTERFACE( sio_intf ) { 0, 0, 0, 0, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL }; //------------------------------------------------- // MACHINE_DRIVER( abc_sio ) //------------------------------------------------- static MACHINE_CONFIG_FRAGMENT( abc_sio ) MCFG_Z80CTC_ADD(Z80CTC_TAG, XTAL_4_9152MHz, ctc_intf) MCFG_Z80DART_ADD(Z80SIO_TAG, 0, sio_intf) MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor abc_sio_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( abc_sio ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // abc_sio_device - constructor //------------------------------------------------- abc_sio_device::abc_sio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, ABC_SIO, "ABC SIO", tag, owner, clock, "abcsio", __FILE__), device_abcbus_card_interface(mconfig, *this), m_ctc(*this, Z80CTC_TAG), m_sio(*this, Z80SIO_TAG), m_rom(*this, "abc80") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void abc_sio_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void abc_sio_device::device_reset() { } //************************************************************************** // ABC BUS INTERFACE //************************************************************************** //------------------------------------------------- // abcbus_cs - //------------------------------------------------- void abc_sio_device::abcbus_cs(UINT8 data) { } //------------------------------------------------- // abcbus_xmemfl - //------------------------------------------------- UINT8 abc_sio_device::abcbus_xmemfl(offs_t offset) { UINT8 data = 0xff; if (offset >= 0x4000 && offset < 0x5000) // TODO where is this mapped? { data = m_rom->base()[offset & 0xfff]; } return data; }